You can get an under dash cable from a number of sources. Any of the OD equipped 50s cars will have one, and ALL used a Borg-Warner OD. The under dash park brake cable from a 60s compact or a more modern 70s/80s import will work too. You would want to remove the ratchet and spring from a park brake handle, of course. Just make sure the cable is stiff enough. A choke cable, for example, won't work. An auto trans shift cable will, but then you have to devise a handle for that. There might be some HD control cables similar to universal choke cables that would work, but I don't know where to find one. I've seen T handle control cables (smaller than the Rambler T-handle, but usable), but can't find any kind of source right now. Even tried Grainger's on-line catalog, no dice!